Description of problem:
When you set min-pool-size or max-pool-size manually in standalone.xml to e.g.
${my.nonxa.maxpool:5} the server is started correctly, but configuration of datasource in JON becomes invalid (string value for those properties is not expected) and any further attempt to update this configuration in JON fails.

Version-Release number of selected component (if applicable):
Version :	
3.3.0.DR01
Build Number :	
6468454:dda0a47

How reproducible:
Always

Steps to Reproduce:
1. install and start eap6 standalone
2. import it to jon inventory
3. navigate to this resource->datasources->ExampleDS->Configuration
4. disable this datasource and change default values for min-pool-size and max-pool-size (this will add them to standalone.xml)
5. stop eap6 and edit standalone.xml
  - set min-pool-size to ${my.nonxa.minpool:5}
  - set max-pool-size to ${my.nonxa.maxpool:15}
6. start the eap6 again
7. navigate to datasources->ExampleDS->Configuration and try to change some value keeping min-pool-size and max-pool-size unchanged
 

Actual results:
Configuration update fails with:
java.lang.NumberFormatException: For input string: "${my.nonxa.minpool:5}"
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Integer.parseInt(Integer.java:481)
	at java.lang.Integer.valueOf(Integer.java:582)
	at org.rhq.modules.plugins.jbossas7.ConfigurationWriteDelegate.getObjectWithType(ConfigurationWriteDelegate.java:704)
	at org.rhq.modules.plugins.jbossas7.ConfigurationWriteDelegate.preparePropertySimple(ConfigurationWriteDelegate.java:529)
	at org.rhq.modules.plugins.jbossas7.ConfigurationWriteDelegate.createWriteAttributePropertySimple(ConfigurationWriteDelegate.java:453)
	at org.rhq.modules.plugins.jbossas7.ConfigurationWriteDelegate.createWriteAttribute(ConfigurationWriteDelegate.java:332)
	at org.rhq.modules.plugins.jbossas7.ConfigurationWriteDelegate.updateProperty(ConfigurationWriteDelegate.java:324)
	at org.rhq.modules.plugins.jbossas7.ConfigurationWriteDelegate.updateGenerateOperationFromProperties(ConfigurationWriteDelegate.java:130)
	at org.rhq.modules.plugins.jbossas7.ConfigurationWriteDelegate.updateResourceConfiguration(ConfigurationWriteDelegate.java:103)
	at org.rhq.modules.plugins.jbossas7.DatasourceComponent.updateResourceConfiguration(DatasourceComponent.java:331)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Expected results:
Configuration is updated correctly

Additional info:
Workaround:
Both properties must be set to integer and then the configuration update works.

I guess this is general problem for all properties which are expected to be integer on JON side, but eap6 configuration allows strings.